<template>
  <view class="uni-easyinput" :class="{ 'uni-easyinput-error': msg }" :style="boxStyle">
    <view class="uni-easyinput__content" :class="inputContentClass" :style="inputContentStyle">
      <uni-icons v-if="prefixIcon" class="content-clear-icon" :type="prefixIcon" color="#c0c4cc" @click="onClickIcon('prefix')" size="22"></uni-icons>
      <slot name="left"> </slot>
      <!-- #ifdef MP-ALIPAY -->
      <textarea
        :enableNative="enableNative"
        v-if="type === 'textarea'"
        class="uni-easyinput__content-textarea"
        :class="{ 'input-padding': inputBorder }"
        :name="name"
        :value="val"
        :placeholder="placeholder"
        :placeholderStyle="placeholderStyle"
        :disabled="disabled"
        placeholder-class="uni-easyinput__placeholder-class"
        :maxlength="inputMaxlength"
        :focus="focused"
        :autoHeight="autoHeight"
        :cursor-spacing="cursorSpacing"
        :adjust-position="adjustPosition"
        @input="onInput"
        @blur="_Blur"
        @focus="_Focus"
        @confirm="onConfirm"
        @keyboardheightchange="onkeyboardheightchange"
      ></textarea>
      <input
        :enableNative="enableNative"
        v-else
        :type="type === 'password' ? 'text' : type"
        class="uni-easyinput__content-input"
        :style="inputStyle"
        :name="name"
        :value="val"
        :password="!showPassword && type === 'password'"
        :placeholder="placeholder"
        :placeholderStyle="placeholderStyle"
        placeholder-class="uni-easyinput__placeholder-class"
        :disabled="disabled"
        :maxlength="inputMaxlength"
        :focus="focused"
        :confirmType="confirmType"
        :cursor-spacing="cursorSpacing"
        :adjust-position="adjustPosition"
        @focus="_Focus"
        @blur="_Blur"
        @input="onInput"
        @confirm="onConfirm"
        @keyboardheightchange="onkeyboardheightchange"
      />
      <!-- #endif -->
      <!-- #ifndef MP-ALIPAY -->
      <textarea
        v-if="type === 'textarea'"
        class="uni-easyinput__content-textarea"
        :class="{ 'input-padding': inputBorder }"
        :name="name"
        :value="val"
        :placeholder="placeholder"
        :placeholderStyle="placeholderStyle"
        :disabled="disabled"
        placeholder-class="uni-easyinput__placeholder-class"
        :maxlength="inputMaxlength"
        :focus="focused"
        :autoHeight="autoHeight"
        :cursor-spacing="cursorSpacing"
        :adjust-position="adjustPosition"
        @input="onInput"
        @blur="_Blur"
        @focus="_Focus"
        @confirm="onConfirm"
        @keyboardheightchange="onkeyboardheightchange"
      ></textarea>
      <input
        v-else
        :type="type === 'password' ? 'text' : type"
        class="uni-easyinput__content-input"
        :style="inputStyle"
        :name="name"
        :value="val"
        :password="!showPassword && type === 'password'"
        :placeholder="placeholder"
        :placeholderStyle="placeholderStyle"
        placeholder-class="uni-easyinput__placeholder-class"
        :disabled="disabled"
        :maxlength="inputMaxlength"
        :focus="focused"
        :confirmType="confirmType"
        :cursor-spacing="cursorSpacing"
        :adjust-position="adjustPosition"
        @focus="_Focus"
        @blur="_Blur"
        @input="onInput"
        @confirm="onConfirm"
        @keyboardheightchange="onkeyboardheightchange"
      />
      <!-- #endif -->

      <template v-if="type === 'password' && passwordIcon">
        <!-- 开启密码时显示小眼睛 -->
        <uni-icons v-if="isVal" class="content-clear-icon" :class="{ 'is-textarea-icon': type === 'textarea' }" :type="showPassword ? 'eye-slash-filled' : 'eye-filled'" :size="22" :color="focusShow ? primaryColor : '#c0c4cc'" @click="onEyes"></uni-icons>
      </template>
      <template v-if="suffixIcon">
        <uni-icons v-if="suffixIcon" class="content-clear-icon" :type="suffixIcon" color="#c0c4cc" @click="onClickIcon('suffix')" size="22"></uni-icons>
      </template>
      <template v-else>
        <uni-icons v-if="clearable && isVal && !disabled && type !== 'textarea'" class="content-clear-icon" :class="{ 'is-textarea-icon': type === 'textarea' }" type="clear" :size="clearSize" :color="msg ? '#dd524d' : focusShow ? primaryColor : '#c0c4cc'" @click="onClear"></uni-icons>
      </template>
      <slot name="right"></slot>
    </view>
  </view>
</template>

<script>
  /**
   * Easyinput 输入框
   * @description 此组件可以实现表单的输入与校验，包括 "text" 和 "textarea" 类型。
   * @tutorial https://ext.dcloud.net.cn/plugin?id=3455
   * @property {String}	value	输入内容
   * @property {String }	type	输入框的类型（默认text） password/text/textarea/..
   * 	@value text			文本输入键盘
   * 	@value textarea	多行文本输入键盘
   * 	@value password	密码输入键盘
   * 	@value number		数字输入键盘，注意iOS上app-vue弹出的数字键盘并非9宫格方式
   * 	@value idcard		身份证输入键盘，信、支付宝、百度、QQ小程序
   * 	@value digit		带小数点的数字键盘	，App的nvue页面、微信、支付宝、百度、头条、QQ小程序支持
   * @property {Boolean}	clearable	是否显示右侧清空内容的图标控件，点击可清空输入框内容（默认true）
   * @property {Boolean}	autoHeight	是否自动增高输入区域，type为textarea时有效（默认true）
   * @property {String }	placeholder	输入框的提示文字
   * @property {String }	placeholderStyle	placeholder的样式(内联样式，字符串)，如"color: #ddd"
   * @property {Boolean}	focus	是否自动获得焦点（默认false）
   * @property {Boolean}	disabled	是否禁用（默认false）
   * @property {Number }	maxlength	最大输入长度，设置为 -1 的时候不限制最大长度（默认140）
   * @property {String }	confirmType	设置键盘右下角按钮的文字，仅在type="text"时生效（默认done）
   * @property {Number }	clearSize	清除图标的大小，单位px（默认15）
   * @property {String}	prefixIcon	输入框头部图标
   * @property {String}	suffixIcon	输入框尾部图标
   * @property {String}	primaryColor	设置主题色（默认#2979ff）
   * @property {Boolean}	trim	是否自动去除两端的空格
   * @property {Boolean}	cursorSpacing	指定光标与键盘的距离，单位 px
   * @property {Boolean}  ajust-position 当键盘弹起时，是否上推内容，默认值：true
   * @value both	去除两端空格
   * @value left	去除左侧空格
   * @value right	去除右侧空格
   * @value start	去除左侧空格
   * @value end		去除右侧空格
   * @value all		去除全部空格
   * @value none	不去除空格
   * @property {Boolean}	inputBorder	是否显示input输入框的边框（默认true）
   * @property {Boolean}	passwordIcon	type=password时是否显示小眼睛图标
   * @property {Object}	styles	自定义颜色
   * @event {Function}	input	输入框内容发生变化时触发
   * @event {Function}	focus	输入框获得焦点时触发
   * @event {Function}	blur	输入框失去焦点时触发
   * @event {Function}	confirm	点击完成按钮时触发
   * @event {Function}	iconClick	点击图标时触发
   * @example <uni-easyinput v-model="mobile"></uni-easyinput>
   */
  function obj2strClass(obj) {
    let classess = ''
    for (let key in obj) {
      const val = obj[key]
      if (val) {
        classess += `${key} `
      }
    }
    return classess
  }

  function obj2strStyle(obj) {
    let style = ''
    for (let key in obj) {
      const val = obj[key]
      style += `${key}:${val};`
    }
    return style
  }
  export default {
    name: 'uni-easyinput',
    emits: ['click', 'iconClick', 'update:modelValue', 'input', 'focus', 'blur', 'confirm', 'clear', 'eyes', 'change', 'keyboardheightchange'],
    model: {
      prop: 'modelValue',
      event: 'update:modelValue'
    },
    options: {
      // #ifdef MP-TOUTIAO
      virtualHost: false,
      // #endif
      // #ifndef MP-TOUTIAO
      virtualHost: true
      // #endif
    },
    inject: {
      form: {
        from: 'uniForm',
        default: null
      },
      formItem: {
        from: 'uniFormItem',
        default: null
      }
    },
    props: {
      name: String,
      value: [Number, String],
      modelValue: [Number, String],
      type: {
        type: String,
        default: 'text'
      },
      clearable: {
        type: Boolean,
        default: true
      },
      autoHeight: {
        type: Boolean,
        default: false
      },
      placeholder: {
        type: String,
        default: ' '
      },
      placeholderStyle: String,
      focus: {
        type: Boolean,
        default: false
      },
      disabled: {
        type: Boolean,
        default: false
      },
      maxlength: {
        type: [Number, String],
        default: 140
      },
      confirmType: {
        type: String,
        default: 'done'
      },
      clearSize: {
        type: [Number, String],
        default: 24
      },
      inputBorder: {
        type: Boolean,
        default: true
      },
      prefixIcon: {
        type: String,
        default: ''
      },
      suffixIcon: {
        type: String,
        default: ''
      },
      trim: {
        type: [Boolean, String],
        default: false
      },
      cursorSpacing: {
        type: Number,
        default: 0
      },
      passwordIcon: {
        type: Boolean,
        default: true
      },
      adjustPosition: {
        type: Boolean,
        default: true
      },
      primaryColor: {
        type: String,
        default: '#2979ff'
      },
      styles: {
        type: Object,
        default() {
          return {
            color: '#333',
            backgroundColor: '#fff',
            disableColor: '#F7F6F6',
            borderColor: '#e5e5e5'
          }
        }
      },
      errorMessage: {
        type: [String, Boolean],
        default: ''
      },
      // #ifdef MP-ALIPAY
      enableNative: {
        type: Boolean,
        default: false
      }
      // #endif
    },
    data() {
      return {
        focused: false,
        val: '',
        showMsg: '',
        border: false,
        isFirstBorder: false,
        showClearIcon: false,
        showPassword: false,
        focusShow: false,
        localMsg: '',
        isEnter: false // 用于判断当前是否是使用回车操作
      }
    },
    computed: {
      // 输入框内是否有值
      isVal() {
        const val = this.val
        // fixed by mehaotian 处理值为0的情况，字符串0不在处理范围
        if (val || val === 0) {
          return true
        }
        return false
      },

      msg() {
        // console.log('computed', this.form, this.formItem);
        // if (this.form) {
        // 	return this.errorMessage || this.formItem.errMsg;
        // }
        // TODO 处理头条 formItem 中 errMsg 不更新的问题
        return this.localMsg || this.errorMessage
      },
      // 因为uniapp的input组件的maxlength组件必须要数值，这里转为数值，用户可以传入字符串数值
      inputMaxlength() {
        return Number(this.maxlength)
      },

      // 处理外层样式的style
      boxStyle() {
        return `color:${this.inputBorder && this.msg ? '#e43d33' : this.styles.color};`
      },
      // input 内容的类和样式处理
      inputContentClass() {
        return obj2strClass({
          'is-input-border': this.inputBorder,
          'is-input-error-border': this.inputBorder && this.msg,
          'is-textarea': this.type === 'textarea',
          'is-disabled': this.disabled,
          'is-focused': this.focusShow
        })
      },
      inputContentStyle() {
        const focusColor = this.focusShow ? this.primaryColor : this.styles.borderColor
        const borderColor = this.inputBorder && this.msg ? '#dd524d' : focusColor
        return obj2strStyle({
          'border-color': borderColor || '#e5e5e5',
          'background-color': this.disabled ? this.styles.disableColor : this.styles.backgroundColor
        })
      },
      // input右侧样式
      inputStyle() {
        const paddingRight = this.type === 'password' || this.clearable || this.prefixIcon ? '' : ''
        return obj2strStyle({
          'padding-right': paddingRight,
          'padding-left': this.prefixIcon ? '' : ''
        })
      }
    },
    watch: {
      value(newVal) {
        // fix by mehaotian 解决 值为null的情况下，input报错的bug
        if (newVal === null) {
          this.val = ''
          return
        }
        this.val = newVal
      },
      modelValue(newVal) {
        if (newVal === null) {
          this.val = ''
          return
        }
        this.val = newVal
      },
      focus(newVal) {
        this.$nextTick(() => {
          this.focused = this.focus
          this.focusShow = this.focus
        })
      }
    },
    created() {
      this.init()
      // TODO 处理头条vue3 computed 不监听 inject 更改的问题（formItem.errMsg）
      if (this.form && this.formItem) {
        this.$watch('formItem.errMsg', (newVal) => {
          this.localMsg = newVal
        })
      }
    },
    mounted() {
      this.$nextTick(() => {
        this.focused = this.focus
        this.focusShow = this.focus
      })
    },
    methods: {
      /**
       * 初始化变量值
       */
      init() {
        if (this.value || this.value === 0) {
          this.val = this.value
        } else if (this.modelValue || this.modelValue === 0 || this.modelValue === '') {
          this.val = this.modelValue
        } else {
          // fix by ht 如果初始值为null，则input报错，待框架修复
          this.val = ''
        }
      },

      /**
       * 点击图标时触发
       * @param {Object} type
       */
      onClickIcon(type) {
        this.$emit('iconClick', type)
      },

      /**
       * 显示隐藏内容，密码框时生效
       */
      onEyes() {
        this.showPassword = !this.showPassword
        this.$emit('eyes', this.showPassword)
      },

      /**
       * 输入时触发
       * @param {Object} event
       */
      onInput(event) {
        let value = event.detail.value
        // 判断是否去除空格
        if (this.trim) {
          if (typeof this.trim === 'boolean' && this.trim) {
            value = this.trimStr(value)
          }
          if (typeof this.trim === 'string') {
            value = this.trimStr(value, this.trim)
          }
        }
        if (this.errMsg) this.errMsg = ''
        this.val = value
        // TODO 兼容 vue2
        this.$emit('input', value)
        // TODO　兼容　vue3
        this.$emit('update:modelValue', value)
      },

      /**
       * 外部调用方法
       * 获取焦点时触发
       * @param {Object} event
       */
      onFocus() {
        this.$nextTick(() => {
          this.focused = true
        })
        this.$emit('focus', null)
      },

      _Focus(event) {
        this.focusShow = true
        this.$emit('focus', event)
      },

      /**
       * 外部调用方法
       * 失去焦点时触发
       * @param {Object} event
       */
      onBlur() {
        this.focused = false
        this.$emit('blur', null)
      },
      _Blur(event) {
        let value = event.detail.value
        this.focusShow = false
        this.$emit('blur', event)
        // 根据类型返回值，在event中获取的值理论上讲都是string
        if (this.isEnter === false) {
          this.$emit('change', this.val)
        }
        // 失去焦点时参与表单校验
        if (this.form && this.formItem) {
          const { validateTrigger } = this.form
          if (validateTrigger === 'blur') {
            this.formItem.onFieldChange()
          }
        }
      },

      /**
       * 按下键盘的发送键
       * @param {Object} e
       */
      onConfirm(e) {
        this.$emit('confirm', this.val)
        this.isEnter = true
        this.$emit('change', this.val)
        this.$nextTick(() => {
          this.isEnter = false
        })
      },

      /**
       * 清理内容
       * @param {Object} event
       */
      onClear(event) {
        this.val = ''
        // TODO 兼容 vue2
        this.$emit('input', '')
        // TODO 兼容 vue2
        // TODO　兼容　vue3
        this.$emit('update:modelValue', '')
        // 点击叉号触发
        this.$emit('clear')
      },

      /**
       * 键盘高度发生变化的时候触发此事件
       * 兼容性：微信小程序2.7.0+、App 3.1.0+
       * @param {Object} event
       */
      onkeyboardheightchange(event) {
        this.$emit('keyboardheightchange', event)
      },

      /**
       * 去除空格
       */
      trimStr(str, pos = 'both') {
        if (pos === 'both') {
          return str.trim()
        } else if (pos === 'left') {
          return str.trimLeft()
        } else if (pos === 'right') {
          return str.trimRight()
        } else if (pos === 'start') {
          return str.trimStart()
        } else if (pos === 'end') {
          return str.trimEnd()
        } else if (pos === 'all') {
          return str.replace(/\s+/g, '')
        } else if (pos === 'none') {
          return str
        }
        return str
      }
    }
  }
</script>

<style lang="scss">
  $uni-error: #e43d33;
  $uni-border-1: #dcdfe6 !default;

  .uni-easyinput {
    /* #ifndef APP-NVUE */
    width: 100%;
    /* #endif */
    flex: 1;
    position: relative;
    text-align: left;
    color: #333;
    font-size: 14px;
  }

  .uni-easyinput__content {
    flex: 1;
    /* #ifndef APP-NVUE */
    width: 100%;
    display: flex;
    box-sizing: border-box;
    // min-height: 36px;
    /* #endif */
    flex-direction: row;
    align-items: center;
    // 处理border动画刚开始显示黑色的问题
    border-color: #fff;
    transition-property: border-color;
    transition-duration: 0.3s;
  }

  .uni-easyinput__content-input {
    /* #ifndef APP-NVUE */
    width: auto;
    /* #endif */
    position: relative;
    overflow: hidden;
    flex: 1;
    line-height: 1;
    font-size: 14px;
    height: 35px;
    // min-height: 36px;

    /*ifdef H5*/
    & ::-ms-reveal {
      display: none;
    }

    & ::-ms-clear {
      display: none;
    }

    & ::-o-clear {
      display: none;
    }

    /*endif*/
  }

  .uni-easyinput__placeholder-class {
    color: grey;
    font-size: 14px;
    // font-weight: 200;
  }

  .is-textarea {
    align-items: flex-start;
  }

  .is-textarea-icon {
    margin-top: 5px;
  }

  .uni-easyinput__content-textarea {
    position: relative;
    overflow: hidden;
    flex: 1;
    line-height: 1.5;
    font-size: 14px;
    margin: 6px;
    margin-left: 0;
    height: 80px;
    min-height: 80px;
    /* #ifndef APP-NVUE */
    min-height: 80px;
    width: auto;
    /* #endif */
  }

  .input-padding {
    padding-left: 10px;
  }

  .content-clear-icon {
    padding: 0 5px;
  }

  .label-icon {
    margin-right: 5px;
    margin-top: -1px;
  }

  // 显示边框
  .is-input-border {
    /* #ifndef APP-NVUE */
    display: flex;
    box-sizing: border-box;
    /* #endif */
    flex-direction: row;
    align-items: center;
    border: 1px solid $uni-border-1;
    border-radius: 4px;
    /* #ifdef MP-ALIPAY */
    overflow: hidden;
    /* #endif */
  }

  .uni-error-message {
    position: absolute;
    bottom: -17px;
    left: 0;
    line-height: 12px;
    color: $uni-error;
    font-size: 12px;
    text-align: left;
  }

  .uni-error-msg--boeder {
    position: relative;
    bottom: 0;
    line-height: 22px;
  }

  .is-input-error-border {
    border-color: $uni-error;

    .uni-easyinput__placeholder-class {
      color: mix(#fff, $uni-error, 50%);
    }
  }

  .uni-easyinput--border {
    margin-bottom: 0;
    padding: 10px 15px;
    // padding-bottom: 0;
    border-top: 1px #eee solid;
  }

  .uni-easyinput-error {
    padding-bottom: 0;
  }

  .is-first-border {
    /* #ifndef APP-NVUE */
    border: none;
    /* #endif */
    /* #ifdef APP-NVUE */
    border-width: 0;
    /* #endif */
  }

  .is-disabled {
    background-color: #f7f6f6;
    color: #d5d5d5;

    .uni-easyinput__placeholder-class {
      color: #d5d5d5;
      font-size: 14px;
    }
  }
</style>
